DRILLING RIG Russian patent published in 2007 - IPC E21B3/00 E21B19/84 

FIELD: mining, particularly drilling rigs for blast-hole drilling in mine tunnel roof.

SUBSTANCE: drilling rig comprises movable rotator installed on guiding mounting and provided with feeding device. The feeding device includes friction pulley and flexible member passing over the friction pulley. The flexible member includes working and idle branches. The idle branch is connected to tightening device. Guiding mounting includes two telescopic parts, namely post and body. Minor pulleys are secured to body ends. Working branch end is fastened to the post so that working branch serially passes over lower and upper minor pulleys and turns over friction pulley. The tightening device is installed on the post. The post and the body are provided with devices, which prevent mutual post and body rotation and control rotator and body movement order.

EFFECT: increased efficiency of blast-hole drilling in mine tunnel roof in the case of large roof height difference.

4 cl, 4 dwg